539 lines
20 KiB
C++
539 lines
20 KiB
C++
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/*
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* Blackmagic DeckLink output
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* Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* Include internal.h first to avoid conflict between winsock.h (used by
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* DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
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extern "C" {
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#include "libavformat/internal.h"
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}
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#include <DeckLinkAPI.h>
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#ifdef _WIN32
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#include <DeckLinkAPI_i.c>
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#else
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/* The file provided by the SDK is known to be missing prototypes, which doesn't
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cause issues with GCC since the warning doesn't apply to C++ files. However
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Clang does complain (and warnings are treated as errors), so suppress the
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warning just for this one file */
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#ifdef __clang__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wmissing-prototypes"
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#endif
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#include <DeckLinkAPIDispatch.cpp>
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#ifdef __clang__
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#pragma clang diagnostic pop
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#endif
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#endif
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extern "C" {
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#include "libavformat/avformat.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/bswap.h"
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#include "avdevice.h"
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}
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#include "decklink_common.h"
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static IDeckLinkIterator *decklink_create_iterator(AVFormatContext *avctx)
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{
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IDeckLinkIterator *iter;
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#ifdef _WIN32
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if (CoInitialize(NULL) < 0) {
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av_log(avctx, AV_LOG_ERROR, "COM initialization failed.\n");
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return NULL;
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}
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if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
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IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
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iter = NULL;
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}
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#else
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iter = CreateDeckLinkIteratorInstance();
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#endif
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if (!iter)
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av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator. "
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"Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n");
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return iter;
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}
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static int decklink_get_attr_string(IDeckLink *dl, BMDDeckLinkAttributeID cfg_id, const char **s)
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{
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DECKLINK_STR tmp;
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HRESULT hr;
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IDeckLinkProfileAttributes *attr;
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*s = NULL;
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if (dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&attr) != S_OK)
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return AVERROR_EXTERNAL;
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hr = attr->GetString(cfg_id, &tmp);
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attr->Release();
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if (hr == S_OK) {
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*s = DECKLINK_STRDUP(tmp);
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DECKLINK_FREE(tmp);
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if (!*s)
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return AVERROR(ENOMEM);
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} else if (hr == E_FAIL) {
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return AVERROR_EXTERNAL;
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}
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return 0;
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}
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static int decklink_select_input(AVFormatContext *avctx, BMDDeckLinkConfigurationID cfg_id)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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BMDDeckLinkAttributeID attr_id = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? BMDDeckLinkAudioInputConnections : BMDDeckLinkVideoInputConnections;
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int64_t bmd_input = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? (int64_t)ctx->audio_input : (int64_t)ctx->video_input;
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const char *type_name = (cfg_id == bmdDeckLinkConfigAudioInputConnection) ? "audio" : "video";
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int64_t supported_connections = 0;
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HRESULT res;
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if (bmd_input) {
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res = ctx->attr->GetInt(attr_id, &supported_connections);
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if (res != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Failed to query supported %s inputs.\n", type_name);
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return AVERROR_EXTERNAL;
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}
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if ((supported_connections & bmd_input) != bmd_input) {
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av_log(avctx, AV_LOG_ERROR, "Device does not support selected %s input.\n", type_name);
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return AVERROR(ENOSYS);
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}
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res = ctx->cfg->SetInt(cfg_id, bmd_input);
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if (res != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Failed to select %s input.\n", type_name);
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return AVERROR_EXTERNAL;
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}
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}
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return 0;
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}
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static DECKLINK_BOOL field_order_eq(enum AVFieldOrder field_order, BMDFieldDominance bmd_field_order)
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{
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if (field_order == AV_FIELD_UNKNOWN)
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return true;
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if ((field_order == AV_FIELD_TT || field_order == AV_FIELD_TB) && bmd_field_order == bmdUpperFieldFirst)
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return true;
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if ((field_order == AV_FIELD_BB || field_order == AV_FIELD_BT) && bmd_field_order == bmdLowerFieldFirst)
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return true;
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if (field_order == AV_FIELD_PROGRESSIVE && (bmd_field_order == bmdProgressiveFrame || bmd_field_order == bmdProgressiveSegmentedFrame))
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return true;
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return false;
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}
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int ff_decklink_set_configs(AVFormatContext *avctx,
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decklink_direction_t direction) {
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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HRESULT res;
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if (ctx->duplex_mode) {
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DECKLINK_BOOL duplex_supported = false;
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#if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
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IDeckLinkProfileManager *manager = NULL;
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if (ctx->dl->QueryInterface(IID_IDeckLinkProfileManager, (void **)&manager) == S_OK)
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duplex_supported = true;
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#else
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if (ctx->attr->GetFlag(BMDDeckLinkSupportsDuplexModeConfiguration, &duplex_supported) != S_OK)
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duplex_supported = false;
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#endif
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if (duplex_supported) {
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#if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
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IDeckLinkProfile *profile = NULL;
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BMDProfileID bmd_profile_id = ctx->duplex_mode == 2 ? bmdProfileOneSubDeviceFullDuplex : bmdProfileTwoSubDevicesHalfDuplex;
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res = manager->GetProfile(bmd_profile_id, &profile);
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if (res == S_OK) {
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res = profile->SetActive();
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profile->Release();
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}
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manager->Release();
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#else
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res = ctx->cfg->SetInt(bmdDeckLinkConfigDuplexMode, ctx->duplex_mode == 2 ? bmdDuplexModeFull : bmdDuplexModeHalf);
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#endif
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if (res != S_OK)
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av_log(avctx, AV_LOG_WARNING, "Setting duplex mode failed.\n");
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else
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av_log(avctx, AV_LOG_VERBOSE, "Successfully set duplex mode to %s duplex.\n", ctx->duplex_mode == 2 ? "full" : "half");
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} else {
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av_log(avctx, AV_LOG_WARNING, "Unable to set duplex mode, because it is not supported.\n");
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}
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}
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if (direction == DIRECTION_IN) {
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int ret;
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ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
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if (ret < 0)
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return ret;
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ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
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if (ret < 0)
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return ret;
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}
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if (direction == DIRECTION_OUT && cctx->timing_offset != INT_MIN) {
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res = ctx->cfg->SetInt(bmdDeckLinkConfigReferenceInputTimingOffset, cctx->timing_offset);
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if (res != S_OK)
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av_log(avctx, AV_LOG_WARNING, "Setting timing offset failed.\n");
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}
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return 0;
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}
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int ff_decklink_set_format(AVFormatContext *avctx,
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int width, int height,
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int tb_num, int tb_den,
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enum AVFieldOrder field_order,
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decklink_direction_t direction)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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#if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
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DECKLINK_BOOL support;
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#else
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BMDDisplayModeSupport support;
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#endif
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IDeckLinkDisplayModeIterator *itermode;
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IDeckLinkDisplayMode *mode;
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int i = 1;
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HRESULT res;
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av_log(avctx, AV_LOG_DEBUG, "Trying to find mode for frame size %dx%d, frame timing %d/%d, field order %d, direction %d, format code %s\n",
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width, height, tb_num, tb_den, field_order, direction, cctx->format_code ? cctx->format_code : "(unset)");
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if (direction == DIRECTION_IN) {
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res = ctx->dli->GetDisplayModeIterator (&itermode);
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} else {
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res = ctx->dlo->GetDisplayModeIterator (&itermode);
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}
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if (res!= S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
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return AVERROR(EIO);
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}
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char format_buf[] = " ";
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if (cctx->format_code)
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memcpy(format_buf, cctx->format_code, FFMIN(strlen(cctx->format_code), sizeof(format_buf)));
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BMDDisplayMode target_mode = (BMDDisplayMode)AV_RB32(format_buf);
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AVRational target_tb = av_make_q(tb_num, tb_den);
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ctx->bmd_mode = bmdModeUnknown;
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while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
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BMDTimeValue bmd_tb_num, bmd_tb_den;
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int bmd_width = mode->GetWidth();
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int bmd_height = mode->GetHeight();
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BMDDisplayMode bmd_mode = mode->GetDisplayMode();
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BMDFieldDominance bmd_field_dominance = mode->GetFieldDominance();
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mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
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AVRational mode_tb = av_make_q(bmd_tb_num, bmd_tb_den);
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if ((bmd_width == width &&
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bmd_height == height &&
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!av_cmp_q(mode_tb, target_tb) &&
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field_order_eq(field_order, bmd_field_dominance))
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|| target_mode == bmd_mode) {
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ctx->bmd_mode = bmd_mode;
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ctx->bmd_width = bmd_width;
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ctx->bmd_height = bmd_height;
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ctx->bmd_tb_den = bmd_tb_den;
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ctx->bmd_tb_num = bmd_tb_num;
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ctx->bmd_field_dominance = bmd_field_dominance;
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av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
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bmd_width, bmd_height, 1/av_q2d(mode_tb),
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(ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
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}
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mode->Release();
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i++;
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}
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itermode->Release();
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if (ctx->bmd_mode == bmdModeUnknown)
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return -1;
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#if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b050000
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if (direction == DIRECTION_IN) {
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BMDDisplayMode actualMode = ctx->bmd_mode;
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if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
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bmdNoVideoInputConversion, bmdSupportedVideoModeDefault,
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&actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode)
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return -1;
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} else {
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BMDDisplayMode actualMode = ctx->bmd_mode;
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if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,
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bmdNoVideoOutputConversion, bmdSupportedVideoModeDefault,
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&actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode)
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return -1;
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}
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return 0;
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#elif BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
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if (direction == DIRECTION_IN) {
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if (ctx->dli->DoesSupportVideoMode(ctx->video_input, ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
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bmdSupportedVideoModeDefault,
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&support) != S_OK)
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return -1;
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} else {
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BMDDisplayMode actualMode = ctx->bmd_mode;
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if (ctx->dlo->DoesSupportVideoMode(bmdVideoConnectionUnspecified, ctx->bmd_mode, ctx->raw_format,
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bmdSupportedVideoModeDefault,
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&actualMode, &support) != S_OK || !support || ctx->bmd_mode != actualMode) {
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return -1;
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}
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}
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if (support)
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return 0;
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#else
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if (direction == DIRECTION_IN) {
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if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, (BMDPixelFormat) cctx->raw_format,
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bmdVideoOutputFlagDefault,
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&support, NULL) != S_OK)
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return -1;
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} else {
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if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
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bmdVideoOutputVANC,
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&support, NULL) != S_OK || support != bmdDisplayModeSupported) {
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/* Try without VANC enabled */
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if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
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bmdVideoOutputFlagDefault,
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&support, NULL) != S_OK) {
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return -1;
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}
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ctx->supports_vanc = 0;
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}
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}
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if (support == bmdDisplayModeSupported)
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return 0;
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#endif
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return -1;
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}
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int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction) {
|
||
|
|
return ff_decklink_set_format(avctx, 0, 0, 0, 0, AV_FIELD_UNKNOWN, direction);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_decklink_list_devices(AVFormatContext *avctx,
|
||
|
|
struct AVDeviceInfoList *device_list,
|
||
|
|
int show_inputs, int show_outputs)
|
||
|
|
{
|
||
|
|
IDeckLink *dl = NULL;
|
||
|
|
IDeckLinkIterator *iter = decklink_create_iterator(avctx);
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (!iter)
|
||
|
|
return AVERROR(EIO);
|
||
|
|
|
||
|
|
while (ret == 0 && iter->Next(&dl) == S_OK) {
|
||
|
|
IDeckLinkOutput *output_config;
|
||
|
|
IDeckLinkInput *input_config;
|
||
|
|
const char *display_name = NULL;
|
||
|
|
const char *unique_name = NULL;
|
||
|
|
AVDeviceInfo *new_device = NULL;
|
||
|
|
int add = 0;
|
||
|
|
|
||
|
|
ret = decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
|
||
|
|
if (ret < 0)
|
||
|
|
goto next;
|
||
|
|
ret = decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
|
||
|
|
if (ret < 0)
|
||
|
|
goto next;
|
||
|
|
|
||
|
|
if (show_outputs) {
|
||
|
|
if (dl->QueryInterface(IID_IDeckLinkOutput, (void **)&output_config) == S_OK) {
|
||
|
|
output_config->Release();
|
||
|
|
add = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (show_inputs) {
|
||
|
|
if (dl->QueryInterface(IID_IDeckLinkInput, (void **)&input_config) == S_OK) {
|
||
|
|
input_config->Release();
|
||
|
|
add = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (add == 1) {
|
||
|
|
new_device = (AVDeviceInfo *) av_mallocz(sizeof(AVDeviceInfo));
|
||
|
|
if (!new_device) {
|
||
|
|
ret = AVERROR(ENOMEM);
|
||
|
|
goto next;
|
||
|
|
}
|
||
|
|
|
||
|
|
new_device->device_name = av_strdup(unique_name ? unique_name : display_name);
|
||
|
|
new_device->device_description = av_strdup(display_name);
|
||
|
|
|
||
|
|
if (!new_device->device_name ||
|
||
|
|
!new_device->device_description ||
|
||
|
|
av_dynarray_add_nofree(&device_list->devices, &device_list->nb_devices, new_device) < 0) {
|
||
|
|
ret = AVERROR(ENOMEM);
|
||
|
|
av_freep(&new_device->device_name);
|
||
|
|
av_freep(&new_device->device_description);
|
||
|
|
av_freep(&new_device);
|
||
|
|
goto next;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
next:
|
||
|
|
av_freep(&display_name);
|
||
|
|
av_freep(&unique_name);
|
||
|
|
dl->Release();
|
||
|
|
}
|
||
|
|
iter->Release();
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This is a wrapper around the ff_decklink_list_devices() which dumps the
|
||
|
|
output to av_log() and exits (for backward compatibility with the
|
||
|
|
"-list_devices" argument). */
|
||
|
|
void ff_decklink_list_devices_legacy(AVFormatContext *avctx,
|
||
|
|
int show_inputs, int show_outputs)
|
||
|
|
{
|
||
|
|
struct AVDeviceInfoList *device_list = NULL;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
device_list = (struct AVDeviceInfoList *) av_mallocz(sizeof(AVDeviceInfoList));
|
||
|
|
if (!device_list)
|
||
|
|
return;
|
||
|
|
|
||
|
|
ret = ff_decklink_list_devices(avctx, device_list, show_inputs, show_outputs);
|
||
|
|
if (ret == 0) {
|
||
|
|
av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink %s devices:\n",
|
||
|
|
show_inputs ? "input" : "output");
|
||
|
|
for (int i = 0; i < device_list->nb_devices; i++) {
|
||
|
|
av_log(avctx, AV_LOG_INFO, "\t'%s'\n", device_list->devices[i]->device_description);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
avdevice_free_list_devices(&device_list);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
|
||
|
|
{
|
||
|
|
struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
|
||
|
|
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
|
||
|
|
IDeckLinkDisplayModeIterator *itermode;
|
||
|
|
IDeckLinkDisplayMode *mode;
|
||
|
|
uint32_t format_code;
|
||
|
|
HRESULT res;
|
||
|
|
|
||
|
|
if (direction == DIRECTION_IN) {
|
||
|
|
int ret;
|
||
|
|
ret = decklink_select_input(avctx, bmdDeckLinkConfigAudioInputConnection);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
ret = decklink_select_input(avctx, bmdDeckLinkConfigVideoInputConnection);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
res = ctx->dli->GetDisplayModeIterator (&itermode);
|
||
|
|
} else {
|
||
|
|
res = ctx->dlo->GetDisplayModeIterator (&itermode);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (res!= S_OK) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
|
||
|
|
return AVERROR(EIO);
|
||
|
|
}
|
||
|
|
|
||
|
|
av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n\tformat_code\tdescription",
|
||
|
|
avctx->url);
|
||
|
|
while (itermode->Next(&mode) == S_OK) {
|
||
|
|
BMDTimeValue tb_num, tb_den;
|
||
|
|
mode->GetFrameRate(&tb_num, &tb_den);
|
||
|
|
format_code = av_bswap32(mode->GetDisplayMode());
|
||
|
|
av_log(avctx, AV_LOG_INFO, "\n\t%.4s\t\t%ldx%ld at %d/%d fps",
|
||
|
|
(char*) &format_code, mode->GetWidth(), mode->GetHeight(),
|
||
|
|
(int) tb_den, (int) tb_num);
|
||
|
|
switch (mode->GetFieldDominance()) {
|
||
|
|
case bmdLowerFieldFirst:
|
||
|
|
av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
|
||
|
|
case bmdUpperFieldFirst:
|
||
|
|
av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
|
||
|
|
}
|
||
|
|
mode->Release();
|
||
|
|
}
|
||
|
|
av_log(avctx, AV_LOG_INFO, "\n");
|
||
|
|
|
||
|
|
itermode->Release();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ff_decklink_cleanup(AVFormatContext *avctx)
|
||
|
|
{
|
||
|
|
struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
|
||
|
|
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
|
||
|
|
|
||
|
|
if (ctx->dli)
|
||
|
|
ctx->dli->Release();
|
||
|
|
if (ctx->dlo)
|
||
|
|
ctx->dlo->Release();
|
||
|
|
if (ctx->attr)
|
||
|
|
ctx->attr->Release();
|
||
|
|
if (ctx->cfg)
|
||
|
|
ctx->cfg->Release();
|
||
|
|
if (ctx->dl)
|
||
|
|
ctx->dl->Release();
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_decklink_init_device(AVFormatContext *avctx, const char* name)
|
||
|
|
{
|
||
|
|
struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
|
||
|
|
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
|
||
|
|
IDeckLink *dl = NULL;
|
||
|
|
IDeckLinkIterator *iter = decklink_create_iterator(avctx);
|
||
|
|
if (!iter)
|
||
|
|
return AVERROR_EXTERNAL;
|
||
|
|
|
||
|
|
while (iter->Next(&dl) == S_OK) {
|
||
|
|
const char *display_name = NULL;
|
||
|
|
const char *unique_name = NULL;
|
||
|
|
decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
|
||
|
|
decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
|
||
|
|
if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) {
|
||
|
|
av_free((void *)unique_name);
|
||
|
|
av_free((void *)display_name);
|
||
|
|
ctx->dl = dl;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
av_free((void *)display_name);
|
||
|
|
av_free((void *)unique_name);
|
||
|
|
dl->Release();
|
||
|
|
}
|
||
|
|
iter->Release();
|
||
|
|
if (!ctx->dl)
|
||
|
|
return AVERROR(ENXIO);
|
||
|
|
|
||
|
|
if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
|
||
|
|
ff_decklink_cleanup(avctx);
|
||
|
|
return AVERROR_EXTERNAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ctx->dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&ctx->attr) != S_OK) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
|
||
|
|
ff_decklink_cleanup(avctx);
|
||
|
|
return AVERROR_EXTERNAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|